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CRYOGENICS OPERATIONS 2008 Organized by CERN

CRYOGENICS OPERATIONS 2008 Organized by CERN. LARGE SCALE CRYOGENIC SYSTEM Hermann Herzog. The DESY Lab; Intro The HERA Cryogenic System Operational History Availability, Reliability Operational Experience Failures Summary. Large scale cryogenic system. The Research Centre DESY.

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CRYOGENICS OPERATIONS 2008 Organized by CERN

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  1. CRYOGENICS OPERATIONS 2008Organized by CERN LARGE SCALE CRYOGENIC SYSTEM Hermann Herzog Cryogenics Operations 2008, CERN, Geneva, Switzerland

  2. The DESY Lab; Intro The HERA Cryogenic System Operational History Availability, Reliability Operational Experience Failures Summary Large scale cryogenic system Cryogenics Operations 2008, CERN, Geneva, Switzerland

  3. The Research Centre DESY • Aerial view of the Lab Cryogenics Operations 2008, CERN, Geneva, Switzerland

  4. The Research Centre DESY Aerial view of the Lab Cryogenics Operations 2008, CERN, Geneva, Switzerland 4 H. Herzog, 22th-26th September 2008

  5. The Research Centre DESY Budget Finance Permanent Staff Education International Cooperation Permanent guest research groups Users of the DESY facilities Cryogenics Operations 2008, CERN, Geneva, Switzerland 5 H. Herzog, 22th-26th September 2008

  6. The Research Centre DESY Long tradition on cryogenics @ DESY 1964 H2 Liquefier 45l/h, bubble chamber 1970 He Liquefier, 12W 1972 He Liquefier, 200W, PLUTO 1979 He Liquefier, 200W, CELLO 1982 He Liquefier, 900W, cryostat devlp. 1985 He Liquefier, 300W, s.c. cavity HERA 1985 3x large He Liquefier, HERA Cryogenics Operations 2008, CERN, Geneva, Switzerland 6 H. Herzog, 22th-26th September 2008

  7. Long tradition on cryogenics @ DESY 1964 -1972 H2 Liquefier 45l/h for Bubble Chamber Cryogenics Operations 2008, CERN, Geneva, Switzerland 7 H. Herzog, 22th-26th September 2008

  8. Long tradition on cryogenics @ DESY 1982 He Liquefier 900W HERA Cryostat development, s.c. cavities Cryogenics Operations 2008, CERN, Geneva, Switzerland 8 H. Herzog, 22th-26th September 2008

  9. Long tradition on cryogenics @ DESY 1985 He Liquefier 300W s.c. cavity test facility Cryogenics Operations 2008, CERN, Geneva, Switzerland 9 H. Herzog, 22th-26th September 2008

  10. Long tradition on cryogenics @ DESY 1985 3 large He-Refrigerators for HERA Cryogenics Operations 2008, CERN, Geneva, Switzerland 10 H. Herzog, 22th-26th September 2008

  11. Overview Current (HERA-) Cryoplant H1 N CBX1 s.l. Cavities W O HERMES Referenz Magnete CBX2 S CBX3 ZEUS CMTB MTH SMES FLASH Cryogenics Operations 2008, CERN, Geneva, Switzerland 11 H. Herzog, 22th-26th September 2008

  12. Operational history of the HERA cryoplant Cryogenics Operations 2008, CERN, Geneva, Switzerland 12 H. Herzog, 22th-26th September 2008

  13. Basic Agreement DESY-LINDE • Operation and maintenance of the Cryoplant under full responsibility of LINDE KRYOTECHNIK AG Cryogenics Operations 2008, CERN, Geneva, Switzerland 13 H. Herzog, 22th-26th September 2008

  14. Operational experience • Shift system • 6 shift crews • 24/7/12 at least 1 operator on shift Cryogenics Operations 2008, CERN, Geneva, Switzerland 14 H. Herzog, 22th-26th September 2008

  15. Operational experience Cryogenics Operations 2008, CERN, Geneva, Switzerland 15 H. Herzog, 22th-26th September 2008

  16. Operational experience Cryogenics Operations 2008, CERN, Geneva, Switzerland 16 H. Herzog, 22th-26th September 2008

  17. Failure statistics But this is the failure statistics Including infrastructure of Helium users! Failure statistics of refrigerating plant only. Cryogenics Operations 2008, CERN, Geneva, Switzerland 17 H. Herzog, 22th-26th September 2008

  18. Summary • Throughout 17 years of HERA-operation the refrigeration plant • compensated the cryogenic loads of the HERA accelerator, • the HERA experiments and temporarily the FLASH accelerator • and other recipients with a correspondingavailability of 98,7 %. • Related to the availability of the refrigerationplant itself • this valueexceeds 99 %. A plant-availability of 99 % is possible if periodical maintenance as well as the exchange of critical components (O-ring sealing, power supplies, emergency-power supplies, PLC’s, etc) is carried out. Cryogenics Operations 2008, CERN, Geneva, Switzerland 18 H. Herzog, 22th-26th September 2008

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